Search
Filters
Close

CO2 corrosion H2S corrosion Organic Acid Corrosion - a Unifying Perspective on Corrosion Mechanisms in Weak Acid Solutions

The recent developments in understanding the mechanism of mild steel corrosion in the presence of carboxylic acids carbon dioxide and hydrogen sulfide has challenged the conventional view to corrosion in such environments. In all of these corrosion scenarios the experimental and theoretical investigation of the electrochemical behavior of these systems has shown that the dissociation of the weak acids present in these solutions are the main cause for the observed high corrosivity. That is in contrast with the conventional mechanistic understandings where the observed high corrosivity was associated with the direct reduction of these species. In that sense the recent findings suggest that neither carboxylic acids carbon dioxide nor hydrogen sulfide are inherently corrosive they merely exacerbate an existing corrosion process. In this study it is shown that the buffering effect is an inherent property of any weak acid and it accounts for all characteristic behaviors observed in cathodic currents in the cases considered. The findings based on the individual cases discussed above can be recasted into a generic mechanistic view of corrosion in weak acid solutions. In order to elucidate this general property a comprehensive mathematical model was developed and used to discuss the expected behavior of a hypothetical weak acid depending on the kinetic and thermodynamic properties of its dissociation reaction. Furthermore a simple and generic categorization of weak acids is proposed to serve as a basis to assess the detrimental effect of any weak acid on mild steel corrosion.

Product Number: 51319-12876-SG
Author: Aria Kahyarian
Publication Date: 2019
$0.00
$20.00
$20.00
Also Purchased
Picture for 02294 ORGANIC ACID CORROSION IN OIL AND...
Available for download

02294 ORGANIC ACID CORROSION IN OIL AND GAS PRODUCTION

Product Number: 51300-02294-SG
ISBN: 02294 2002 CP
Author: Michael W. Joosten, Juri Kolts, Justin W. Hembree, and Mohsen Achour
$20.00
Picture for 01343 CORROSION BY ORGANIC ACIDS
Available for download

01343 CORROSION BY ORGANIC ACIDS

Product Number: 51300-01343-SG
ISBN: 01343 2001 CP
Author: L. A. Scribner, Jr.
$20.00
Picture for 02121 Metallic Materials for Nitric Acid Service
Available for download

02121 Metallic Materials for Nitric Acid Service

Product Number: 51300-02121-SG
ISBN: 02121 2002 CP
Author: Te-Lin Yau, Ph.D.
$20.00